diff --git a/Plang b/Plang
index 843f8e36..c08e55ea 160000
--- a/Plang
+++ b/Plang
@@ -1 +1 @@
-Subproject commit 843f8e361c8d57193515db360f10104829acb2fc
+Subproject commit c08e55ea9e7d7842d229d089b58ca0fc13240d4f
diff --git a/Plugins/Plang.pm b/Plugins/Plang.pm
index f6697303..23ee8cde 100644
--- a/Plugins/Plang.pm
+++ b/Plugins/Plang.pm
@@ -38,21 +38,21 @@ sub initialize {
     $self->{plang} = Plang::Interpreter->new(embedded => 1, debug => $debug);
 
     # register some PBot-specific built-in functions
-    $self->{plang}->{interpreter}->add_function_builtin('factset',
+    $self->{plang}->{interpreter}->add_builtin_function('factset',
         # parameters are [['param1 name', default arg], ['param2 name', default arg], ...]
         [['namespace', undef], ['keyword', undef], ['text', undef]],
         sub { $self->set_factoid(@_) });
 
-    $self->{plang}->{interpreter}->add_function_builtin('factget',
+    $self->{plang}->{interpreter}->add_builtin_function('factget',
         [['namespace', undef], ['keyword', undef], ['meta', ['STRING', 'action']]],
         sub { $self->get_factoid(@_) });
 
-    $self->{plang}->{interpreter}->add_function_builtin('factappend',
+    $self->{plang}->{interpreter}->add_builtin_function('factappend',
         [['namespace', undef], ['keyword', undef], ['text', undef]],
         sub { $self->append_factoid(@_) });
 
     # override the built-in `print` function to send to our output buffer instead
-    $self->{plang}->{interpreter}->add_function_builtin('print',
+    $self->{plang}->{interpreter}->add_builtin_function('print',
         [['stmt', undef], ['end', ['STRING', "\n"]]],
         sub { $self->print_override(@_) });